Toothbrush



FIG. 1 is an end elevational view of a toothbrush, showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is an end elevational view taken from the end opposite that shown in FIG. 1. 

The ornamental design for a toothbrush, as shown. 